Entwicklung metallbeschichteter Kapillaroptiken zur Fokussierung weicher Roentgenstrahlung aus mobilen Strahlungsquellen Schlussbericht

In this project we developed metal coated capillary optics for X-ray microfocusing. Techniques for the production of proper glass capillaries and for the characterization of their performance in X-ray optics (transmission, beam profile, beam divergence and energy spectrum of focused photons) were provided. Beam diameters below 2 #mu#m and an increase of the photon flux density of up to two orders of magnitude in the focus, also with hard X-rays, were achieved using lead glass capillaries. The beam divergence behind ellipsoidal capillaries allows a working distance of about 0.5 mm. A coating facility based ofn the CVD technique was built up and, starting from well suited precursor substances, used to coat glass capillaries with various metals. With the integrated quadrupole mass spectrometer the coating process is monitored very precisely. The coating results of microcapillaries show that proper precursors are available and that a homogeneous coating of class capillaries of inner diameter between 200 #mu#m and 10 #mu#m was achieved. The obtained metal films on the capillary surface were analyzed by light and electron microscopy. Additionally, they were characterized non-destructively by X-ray fluorescence measurements at the synchrotron beam. The capillary optics are used with laboratory X-ray sources as well as with the X-ray microprobe at HASYLAB for beam focusing in the 2-5 #mu#m range. (orig.)SIGLEAvailable from TIB Hannover: F99B1255+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman